Update 11 - Skin gain multiplier

We use SkillCostMultiplier by default now, SkillGainMultiplier available for manual editing in Balance.eco.

It's just two different approaches.

The SkillGainMultiplier increases or lowers the XP rate you have to get the necessary XP towards the next star.
The SkillCostMultiplier increases or lowers the XP necessary to the next star.

There hence is not a lot of difference between the two, just that they work opposite ways - both make you gain stars faster or slower depending on your settings.

The advantage of SkillCostMultiplier is that it can be used for much more fine grained balance, as the SkillGainMultiplier also affects housing and food xp automatically, not just the base rate - a change there hence has multiplicative effects due to the systems increasing XP also being affected.

If i remember correctly, SkillGainMultiplier also wasn't used in the presets before Update 11, but SpecialtyCostMultiplier which is the old name for SkillCostMultiplier. So technically, nothing changed - we just don't want to display the average user two things that effectively do the same and can be confusing.